refrigerant low in a 2005 lincoln town it keeps sitting it back out why?

Ck ac refrigerant is low but when trying to fill it spits back out compressor works fine and there are know leaks why is this?

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

no where near enough info to even guess. KB
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
On Fri, 19 Jul 2013 15:18:01 +0000, Cc

1. What leads you to believe the refrigerant is low? 2. How do you know the compressor works fine? 3. Have you hooked up a set of A/C gauges to it? If so, what were the static and running pressures? Any unusual fluctuations while running? 4. I presume when you wrote "know" that you really meant "no." If so, how do you know this?
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.